Super Zero® uses a specialist twisting process developed by Japanese yarn maker Asano Nenshi.

Textile yarn is combined with a water-soluble thread, then treated using controlled twisting and vacuum steam. The temporary thread supports this construction through weaving before being dissolved during washing.

Its removal leaves spaces within the yarn, allowing the fibres to expand. The difference begins inside the yarn itself, changing its internal structure before it becomes part of the finished denim.

This 13oz raw selvedge feels less stiff from the outset than most traditional raw selvedge.

Its softer, more supple handle means less of the initial rigidity often associated with raw denim. The yarn construction gives the cloth more natural give, allowing it to move with the body without elastane while retaining its structure.

Deep indigo and a subtle surface sheen add richness to the cloth, which will develop its own creases and fades with use.

Kowa’s textile history began in 1894 as a cotton fabric wholesaler in Japan.

Today, its denim development combines traditional Japanese textile techniques with research into fibres and yarn construction. Its work spans natural materials including specialist cottons and silk, exploring how the choice of fibre changes the character of the finished cloth.

For Super Zero Indigo, that approach brings innovative yarn technology into a traditional redline selvedge.